/drivers/staging/comedi/drivers/cb_pcimdas.c
https://bitbucket.org/wisechild/galaxy-nexus · C · 532 lines · 319 code · 73 blank · 140 comment · 32 complexity · 423249ec0bf97f2731aacebdd6f4d647 MD5 · raw file
- /*
- comedi/drivers/cb_pcimdas.c
- Comedi driver for Computer Boards PCIM-DAS1602/16
- COMEDI - Linux Control and Measurement Device Interface
- Copyright (C) 2000 David A. Schleef <ds@schleef.org>
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- /*
- Driver: cb_pcimdas
- Description: Measurement Computing PCI Migration series boards
- Devices: [ComputerBoards] PCIM-DAS1602/16 (cb_pcimdas)
- Author: Richard Bytheway
- Updated: Wed, 13 Nov 2002 12:34:56 +0000
- Status: experimental
- Written to support the PCIM-DAS1602/16 on a 2.4 series kernel.
- Configuration Options:
- [0] - PCI bus number
- [1] - PCI slot number
- Developed from cb_pcidas and skel by Richard Bytheway (mocelet@sucs.org).
- Only supports DIO, AO and simple AI in it's present form.
- No interrupts, multi channel or FIFO AI, although the card looks like it could support this.
- See http://www.mccdaq.com/PDFs/Manuals/pcim-das1602-16.pdf for more details.
- */
- #include "../comedidev.h"
- #include <linux/delay.h>
- #include <linux/interrupt.h>
- #include "comedi_pci.h"
- #include "plx9052.h"
- #include "8255.h"
- /* #define CBPCIMDAS_DEBUG */
- #undef CBPCIMDAS_DEBUG
- #define PCI_VENDOR_ID_COMPUTERBOARDS 0x1307
- /* Registers for the PCIM-DAS1602/16 */
- /* sizes of io regions (bytes) */
- #define BADR0_SIZE 2 /* ?? */
- #define BADR1_SIZE 4
- #define BADR2_SIZE 6
- #define BADR3_SIZE 16
- #define BADR4_SIZE 4
- /* DAC Offsets */
- #define ADC_TRIG 0
- #define DAC0_OFFSET 2
- #define DAC1_OFFSET 4
- /* AI and Counter Constants */
- #define MUX_LIMITS 0
- #define MAIN_CONN_DIO 1
- #define ADC_STAT 2
- #define ADC_CONV_STAT 3
- #define ADC_INT 4
- #define ADC_PACER 5
- #define BURST_MODE 6
- #define PROG_GAIN 7
- #define CLK8254_1_DATA 8
- #define CLK8254_2_DATA 9
- #define CLK8254_3_DATA 10
- #define CLK8254_CONTROL 11
- #define USER_COUNTER 12
- #define RESID_COUNT_H 13
- #define RESID_COUNT_L 14
- /* Board description */
- struct cb_pcimdas_board {
- const char *name;
- unsigned short device_id;
- int ai_se_chans; /* Inputs in single-ended mode */
- int ai_diff_chans; /* Inputs in differential mode */
- int ai_bits; /* analog input resolution */
- int ai_speed; /* fastest conversion period in ns */
- int ao_nchan; /* number of analog out channels */
- int ao_bits; /* analogue output resolution */
- int has_ao_fifo; /* analog output has fifo */
- int ao_scan_speed; /* analog output speed for 1602 series (for a scan, not conversion) */
- int fifo_size; /* number of samples fifo can hold */
- int dio_bits; /* number of dio bits */
- int has_dio; /* has DIO */
- const struct comedi_lrange *ranges;
- };
- static const struct cb_pcimdas_board cb_pcimdas_boards[] = {
- {
- .name = "PCIM-DAS1602/16",
- .device_id = 0x56,
- .ai_se_chans = 16,
- .ai_diff_chans = 8,
- .ai_bits = 16,
- .ai_speed = 10000, /* ?? */
- .ao_nchan = 2,
- .ao_bits = 12,
- .has_ao_fifo = 0, /* ?? */
- .ao_scan_speed = 10000,
- /* ?? */
- .fifo_size = 1024,
- .dio_bits = 24,
- .has_dio = 1,
- /* .ranges = &cb_pcimdas_ranges, */
- },
- };
- /* This is used by modprobe to translate PCI IDs to drivers. Should
- * only be used for PCI and ISA-PnP devices */
- static DEFINE_PCI_DEVICE_TABLE(cb_pcimdas_pci_table) = {
- { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS, 0x0056) },
- { 0 }
- };
- MODULE_DEVICE_TABLE(pci, cb_pcimdas_pci_table);
- #define N_BOARDS 1 /* Max number of boards supported */
- /*
- * Useful for shorthand access to the particular board structure
- */
- #define thisboard ((const struct cb_pcimdas_board *)dev->board_ptr)
- /* this structure is for data unique to this hardware driver. If
- several hardware drivers keep similar information in this structure,
- feel free to suggest moving the variable to the struct comedi_device struct. */
- struct cb_pcimdas_private {
- int data;
- /* would be useful for a PCI device */
- struct pci_dev *pci_dev;
- /* base addresses */
- unsigned long BADR0;
- unsigned long BADR1;
- unsigned long BADR2;
- unsigned long BADR3;
- unsigned long BADR4;
- /* Used for AO readback */
- unsigned int ao_readback[2];
- /* Used for DIO */
- unsigned short int port_a; /* copy of BADR4+0 */
- unsigned short int port_b; /* copy of BADR4+1 */
- unsigned short int port_c; /* copy of BADR4+2 */
- unsigned short int dio_mode; /* copy of BADR4+3 */
- };
- /*
- * most drivers define the following macro to make it easy to
- * access the private structure.
- */
- #define devpriv ((struct cb_pcimdas_private *)dev->private)
- /*
- * The struct comedi_driver structure tells the Comedi core module
- * which functions to call to configure/deconfigure (attach/detach)
- * the board, and also about the kernel module that contains
- * the device code.
- */
- static int cb_pcimdas_attach(struct comedi_device *dev,
- struct comedi_devconfig *it);
- static int cb_pcimdas_detach(struct comedi_device *dev);
- static struct comedi_driver driver_cb_pcimdas = {
- .driver_name = "cb_pcimdas",
- .module = THIS_MODULE,
- .attach = cb_pcimdas_attach,
- .detach = cb_pcimdas_detach,
- };
- static int cb_pcimdas_ai_rinsn(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data);
- static int cb_pcimdas_ao_winsn(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data);
- static int cb_pcimdas_ao_rinsn(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data);
- /*
- * Attach is called by the Comedi core to configure the driver
- * for a particular board. If you specified a board_name array
- * in the driver structure, dev->board_ptr contains that
- * address.
- */
- static int cb_pcimdas_attach(struct comedi_device *dev,
- struct comedi_devconfig *it)
- {
- struct comedi_subdevice *s;
- struct pci_dev *pcidev = NULL;
- int index;
- /* int i; */
- printk("comedi%d: cb_pcimdas: ", dev->minor);
- /*
- * Allocate the private structure area.
- */
- if (alloc_private(dev, sizeof(struct cb_pcimdas_private)) < 0)
- return -ENOMEM;
- /*
- * Probe the device to determine what device in the series it is.
- */
- printk("\n");
- for_each_pci_dev(pcidev) {
- /* is it not a computer boards card? */
- if (pcidev->vendor != PCI_VENDOR_ID_COMPUTERBOARDS)
- continue;
- /* loop through cards supported by this driver */
- for (index = 0; index < N_BOARDS; index++) {
- if (cb_pcimdas_boards[index].device_id !=
- pcidev->device)
- continue;
- /* was a particular bus/slot requested? */
- if (it->options[0] || it->options[1]) {
- /* are we on the wrong bus/slot? */
- if (pcidev->bus->number != it->options[0] ||
- PCI_SLOT(pcidev->devfn) != it->options[1]) {
- continue;
- }
- }
- devpriv->pci_dev = pcidev;
- dev->board_ptr = cb_pcimdas_boards + index;
- goto found;
- }
- }
- printk("No supported ComputerBoards/MeasurementComputing card found on "
- "requested position\n");
- return -EIO;
- found:
- printk("Found %s on bus %i, slot %i\n", cb_pcimdas_boards[index].name,
- pcidev->bus->number, PCI_SLOT(pcidev->devfn));
- /* Warn about non-tested features */
- switch (thisboard->device_id) {
- case 0x56:
- break;
- default:
- printk("THIS CARD IS UNSUPPORTED.\n"
- "PLEASE REPORT USAGE TO <mocelet@sucs.org>\n");
- }
- if (comedi_pci_enable(pcidev, "cb_pcimdas")) {
- printk(" Failed to enable PCI device and request regions\n");
- return -EIO;
- }
- devpriv->BADR0 = pci_resource_start(devpriv->pci_dev, 0);
- devpriv->BADR1 = pci_resource_start(devpriv->pci_dev, 1);
- devpriv->BADR2 = pci_resource_start(devpriv->pci_dev, 2);
- devpriv->BADR3 = pci_resource_start(devpriv->pci_dev, 3);
- devpriv->BADR4 = pci_resource_start(devpriv->pci_dev, 4);
- #ifdef CBPCIMDAS_DEBUG
- printk("devpriv->BADR0 = 0x%lx\n", devpriv->BADR0);
- printk("devpriv->BADR1 = 0x%lx\n", devpriv->BADR1);
- printk("devpriv->BADR2 = 0x%lx\n", devpriv->BADR2);
- printk("devpriv->BADR3 = 0x%lx\n", devpriv->BADR3);
- printk("devpriv->BADR4 = 0x%lx\n", devpriv->BADR4);
- #endif
- /* Dont support IRQ yet */
- /* get irq */
- /* if(request_irq(devpriv->pci_dev->irq, cb_pcimdas_interrupt, IRQF_SHARED, "cb_pcimdas", dev )) */
- /* { */
- /* printk(" unable to allocate irq %u\n", devpriv->pci_dev->irq); */
- /* return -EINVAL; */
- /* } */
- /* dev->irq = devpriv->pci_dev->irq; */
- /* Initialize dev->board_name */
- dev->board_name = thisboard->name;
- /*
- * Allocate the subdevice structures. alloc_subdevice() is a
- * convenient macro defined in comedidev.h.
- */
- if (alloc_subdevices(dev, 3) < 0)
- return -ENOMEM;
- s = dev->subdevices + 0;
- /* dev->read_subdev=s; */
- /* analog input subdevice */
- s->type = COMEDI_SUBD_AI;
- s->subdev_flags = SDF_READABLE | SDF_GROUND;
- s->n_chan = thisboard->ai_se_chans;
- s->maxdata = (1 << thisboard->ai_bits) - 1;
- s->range_table = &range_unknown;
- s->len_chanlist = 1; /* This is the maximum chanlist length that */
- /* the board can handle */
- s->insn_read = cb_pcimdas_ai_rinsn;
- s = dev->subdevices + 1;
- /* analog output subdevice */
- s->type = COMEDI_SUBD_AO;
- s->subdev_flags = SDF_WRITABLE;
- s->n_chan = thisboard->ao_nchan;
- s->maxdata = 1 << thisboard->ao_bits;
- s->range_table = &range_unknown; /* ranges are hardware settable, but not software readable. */
- s->insn_write = &cb_pcimdas_ao_winsn;
- s->insn_read = &cb_pcimdas_ao_rinsn;
- s = dev->subdevices + 2;
- /* digital i/o subdevice */
- if (thisboard->has_dio)
- subdev_8255_init(dev, s, NULL, devpriv->BADR4);
- else
- s->type = COMEDI_SUBD_UNUSED;
- printk("attached\n");
- return 1;
- }
- /*
- * _detach is called to deconfigure a device. It should deallocate
- * resources.
- * This function is also called when _attach() fails, so it should be
- * careful not to release resources that were not necessarily
- * allocated by _attach(). dev->private and dev->subdevices are
- * deallocated automatically by the core.
- */
- static int cb_pcimdas_detach(struct comedi_device *dev)
- {
- #ifdef CBPCIMDAS_DEBUG
- if (devpriv) {
- printk("devpriv->BADR0 = 0x%lx\n", devpriv->BADR0);
- printk("devpriv->BADR1 = 0x%lx\n", devpriv->BADR1);
- printk("devpriv->BADR2 = 0x%lx\n", devpriv->BADR2);
- printk("devpriv->BADR3 = 0x%lx\n", devpriv->BADR3);
- printk("devpriv->BADR4 = 0x%lx\n", devpriv->BADR4);
- }
- #endif
- printk("comedi%d: cb_pcimdas: remove\n", dev->minor);
- if (dev->irq)
- free_irq(dev->irq, dev);
- if (devpriv) {
- if (devpriv->pci_dev) {
- if (devpriv->BADR0)
- comedi_pci_disable(devpriv->pci_dev);
- pci_dev_put(devpriv->pci_dev);
- }
- }
- return 0;
- }
- /*
- * "instructions" read/write data in "one-shot" or "software-triggered"
- * mode.
- */
- static int cb_pcimdas_ai_rinsn(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data)
- {
- int n, i;
- unsigned int d;
- unsigned int busy;
- int chan = CR_CHAN(insn->chanspec);
- unsigned short chanlims;
- int maxchans;
- /* only support sw initiated reads from a single channel */
- /* check channel number */
- if ((inb(devpriv->BADR3 + 2) & 0x20) == 0) /* differential mode */
- maxchans = thisboard->ai_diff_chans;
- else
- maxchans = thisboard->ai_se_chans;
- if (chan > (maxchans - 1))
- return -ETIMEDOUT; /* *** Wrong error code. Fixme. */
- /* configure for sw initiated read */
- d = inb(devpriv->BADR3 + 5);
- if ((d & 0x03) > 0) { /* only reset if needed. */
- d = d & 0xfd;
- outb(d, devpriv->BADR3 + 5);
- }
- outb(0x01, devpriv->BADR3 + 6); /* set bursting off, conversions on */
- outb(0x00, devpriv->BADR3 + 7); /* set range to 10V. UP/BP is controlled by a switch on the board */
- /* write channel limits to multiplexer, set Low (bits 0-3) and High (bits 4-7) channels to chan. */
- chanlims = chan | (chan << 4);
- outb(chanlims, devpriv->BADR3 + 0);
- /* convert n samples */
- for (n = 0; n < insn->n; n++) {
- /* trigger conversion */
- outw(0, devpriv->BADR2 + 0);
- #define TIMEOUT 1000 /* typically takes 5 loops on a lightly loaded Pentium 100MHz, */
- /* this is likely to be 100 loops on a 2GHz machine, so set 1000 as the limit. */
- /* wait for conversion to end */
- for (i = 0; i < TIMEOUT; i++) {
- busy = inb(devpriv->BADR3 + 2) & 0x80;
- if (!busy)
- break;
- }
- if (i == TIMEOUT) {
- printk("timeout\n");
- return -ETIMEDOUT;
- }
- /* read data */
- d = inw(devpriv->BADR2 + 0);
- /* mangle the data as necessary */
- /* d ^= 1<<(thisboard->ai_bits-1); // 16 bit data from ADC, so no mangle needed. */
- data[n] = d;
- }
- /* return the number of samples read/written */
- return n;
- }
- static int cb_pcimdas_ao_winsn(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data)
- {
- int i;
- int chan = CR_CHAN(insn->chanspec);
- /* Writing a list of values to an AO channel is probably not
- * very useful, but that's how the interface is defined. */
- for (i = 0; i < insn->n; i++) {
- switch (chan) {
- case 0:
- outw(data[i] & 0x0FFF, devpriv->BADR2 + DAC0_OFFSET);
- break;
- case 1:
- outw(data[i] & 0x0FFF, devpriv->BADR2 + DAC1_OFFSET);
- break;
- default:
- return -1;
- }
- devpriv->ao_readback[chan] = data[i];
- }
- /* return the number of samples read/written */
- return i;
- }
- /* AO subdevices should have a read insn as well as a write insn.
- * Usually this means copying a value stored in devpriv. */
- static int cb_pcimdas_ao_rinsn(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data)
- {
- int i;
- int chan = CR_CHAN(insn->chanspec);
- for (i = 0; i < insn->n; i++)
- data[i] = devpriv->ao_readback[chan];
- return i;
- }
- /*
- * A convenient macro that defines init_module() and cleanup_module(),
- * as necessary.
- */
- static int __devinit driver_cb_pcimdas_pci_probe(struct pci_dev *dev,
- const struct pci_device_id
- *ent)
- {
- return comedi_pci_auto_config(dev, driver_cb_pcimdas.driver_name);
- }
- static void __devexit driver_cb_pcimdas_pci_remove(struct pci_dev *dev)
- {
- comedi_pci_auto_unconfig(dev);
- }
- static struct pci_driver driver_cb_pcimdas_pci_driver = {
- .id_table = cb_pcimdas_pci_table,
- .probe = &driver_cb_pcimdas_pci_probe,
- .remove = __devexit_p(&driver_cb_pcimdas_pci_remove)
- };
- static int __init driver_cb_pcimdas_init_module(void)
- {
- int retval;
- retval = comedi_driver_register(&driver_cb_pcimdas);
- if (retval < 0)
- return retval;
- driver_cb_pcimdas_pci_driver.name =
- (char *)driver_cb_pcimdas.driver_name;
- return pci_register_driver(&driver_cb_pcimdas_pci_driver);
- }
- static void __exit driver_cb_pcimdas_cleanup_module(void)
- {
- pci_unregister_driver(&driver_cb_pcimdas_pci_driver);
- comedi_driver_unregister(&driver_cb_pcimdas);
- }
- module_init(driver_cb_pcimdas_init_module);
- module_exit(driver_cb_pcimdas_cleanup_module);
- MODULE_AUTHOR("Comedi http://www.comedi.org");
- MODULE_DESCRIPTION("Comedi low-level driver");
- MODULE_LICENSE("GPL");